Changing Seals In The Injection Assembly - dosatron D3 RE 3000 Manual De Utilización

CHANGING SEALS IN THE INJECTION ASSEMBLY (with pressure off)
Frequency : Once per year.
IMPORTANT ! Use no tool or metallic utensils
ADVICE: Before dismantling any part of the injection assembly it is
advisable to operate the DOSATRON, injecting clean water so as to rinse
through the injection system. In this way, risks of contact with concentrated
solutions in the injection assembly are minimized.
During any such intervention, wear protective eyewear and gloves !
METHOD OF REMOVING SEAL
Fig. 22 : Between finger and thumb, pinch the component and the seal ;
push towards one side to deform the seal.
Fig. 23 : Increase the deformation to grip the part of the seal thus exposed
and pull it out of its groove.
Clean the seal seating without any tools.
Refitting is done by hand.
It is very important that the seal is not twisted once in place as this would
impair its efficiency.
Fig. 22
© DOSATRON INTERNATIONAL / 52
Fig. 23
CHANGING THE DOSING SEALS
Please refer to the drawings of the different models at the end of this
manual
- Change the seals once a year.
- Turn off the water supply and allow the pressure to drop to zero.
- Take off the suction tube of product (Fig. 24).
- Unscrew the retaining ring (Fig. 25).
- Pull downwards to remove the injection assembly (Fig. 26).
- Change the seals, the suction valve and the barbed fitting.
- Re-assemble in the reverse order to the above by hand.
Fig. 24 Fig. 25
CLEANING AND RE-ASSEMBLING THE SUCTION VALVE SEAL
- Turn off the water supply and allow the pressure to drop to zero.
- Unscrew the nut and pull downwards to remove the suction tube (Fig. 27).
- Unscrew and take off the
suction valve retaining nut
Fig. 27
(Fig. 28), pull out the valve
assembly, dismantle the
valve and thoroughly rinse
the separate components
in clean water.
- Put the valve compo-
nents in the order shown
in the diagram (Fig. 29).
- Re-assemble the compo-
nents in the reverse order
to the dismantling process.
© DOSATRON INTERNATIONAL / 53
Fig. 26
Fig. 28 Fig. 29